2023 BMC Switzerland 257 AL Four
- Category
- Off-road Touring
- Design
- Flat Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Aluminum
- Features
- Disc brake, Women's
Geometry
S | M | |
Stack | 590mm | 640mm |
Reach | 390mm | 420mm |
Stack to Reach Ratio | 1.51:1 | 1.52:1 |
Seat Tube Length, C-T | 450mm | 500mm |
Top Tube Length, Actual C-C | 559mm | 603mm |
Top Tube Slope | 17deg | 15.9deg |
Head Tube Angle | 70deg | 70deg |
Seat Tube Angle | 74deg | 74deg |
Head Tube Length | 165mm | 219mm |
Bottom Bracket Drop | 67mm | 67mm |
Bottom Bracket Height | 281mm | 281mm |
Chainstay Length | 440mm | 440mm |
Chainstay Length Horizontal | 434.9mm | 434.9mm |
Front-Center | 632mm | 680mm |
Front-Center Horizontal | 628.1mm | 676.1mm |
Wheelbase | 1063mm | 1111mm |
Fork Offset/Rake | 45mm | 45mm |
Fork Length (On-Axis) | 408mm | 408mm |
Trail | 78.8mm high | 78.8mm high |
Mechanical Trail | 74mm | 74mm |
Wheel Flop | 25.3mm | 25.3mm |
Standover Height | 644mm | 653mm |
Tire to Pedal Spindle | 114mm 170 mm cranks | 162mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 111mm 170 mm cranks | 111mm 170 mm cranks |
Four Build
S | M | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 37mm | 37mm |
Tire Outer Diameter | 696mm | 696mm |
Bike Length with Tires | 1759mm | 1807mm |
Crank Length | 170mm | 170mm |
Handlebar Width | 600mm | 600mm |
Stem Length | 90mm | 90mm |
Stem Angle | 8deg | 8deg |
Published Sizing Recommendations
Height | 14 ft 2 in to | 14 ft 2 in to |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Off-road TouringSource:https://bmc-switzerland.com/products/257-al-four-st-bikes-bmc-23-10403-010?srsltid=AfmBOoqI8U6_1TBI7g51Mk-f8tB471RU9Iv3YpOzwUk8ORP9y8ymP5n2#geometry_NUGnEj